Color-magnitude photometry of 47 Tucanae to M(V) = +9

Details Color-magnitude photometry of 47 Tucanae to M(V) = +9 Color-magnitude photometry of 47 Tucanae to M(V) = +9

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...268l.111h&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 268, May 15, 1983, p. L111-L115. Research supported

Astronomy and Astrophysics

Astrophysics

33

Astronomical Photometry, Globular Clusters, Stellar Color, Abundance, Color-Magnitude Diagram, Heavy Elements, Magnitude, Vidicons

Scientific paper

A color-magnitude diagram, obtained with the Cerro Tololo Inter-American Observatory vidicon system in direct mode, is presented for the main sequence of 47 Tucanae (= NGC 104 = C0021-723), to a limiting magnitude of V = 22 (M/V/ = +9). The observed scatter along the main sequence is sigma(B - V) = 0.04 mag, consistent with the internal errors of measurement. Isochrone fits with VandenBerg's recent stellar models are consistent with his conclusion that 47 Tuc has an age of 15-18 x 10 to the 9th yr and a heavy-element abundance Z = 0.006.

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